JPH07144544A - Structure for arranging reservoir tank - Google Patents

Abstract

PURPOSE:To avoid limitation on layout in an engine room by forming a reservoir tank for accumulating cooling water, in/ out moved in accordance with adjusting an internal pressure of an engine cooling pipe line, extensibly/ contractibly in accordance with changing an accumulating amount of the cooling water, and arranging the tank in a ventilating part in the inside of a front grill of a vehicle. CONSTITUTION:A reservoir tank 39 is formed i,n a double structure provided with an extensible/contractible inner wall 69 in the inside of the tank, and in its outside, a stockpile space M for receiving cooling water W is formed. A turbosupercharge pressure is supplied to an inside N of the internal wall 69 through a supercharge pressure supply pipe 73 communicating with an intake manifold connection side of a turbosupercharger 71 of an engine 23, and the internal wall 69 is swollen to extend the reservoir tank 39 despite the amount of accumulated cooling water W. Since small space is occupied, in a ventilating part 13 serving as the space without arranging a part or the like for circulating the conventional ventilation, with circulation of conduction air left as ensured, the reservoir tank can be arranged, to increase a design freedom degree of an engine room 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reservoir tank arrangement structure for accommodating an engine cooling water circulation adjustment surplus.

[0002]

2. Description of the Related Art FIG. 4 shows a front portion of a vehicle body in which a conventional reservoir tank of this type is mounted (for example, the actual construction of Sho 58-8555).
2 and JP-A-60-33125).

FIG. 4 shows an engine room 101 of a front engine vehicle, which includes an engine 103 and a radiator 105.
An engine cooling pipe line 107 is provided so as to circulate between and. The cooling water W warmed by the engine 103 flows through the engine cooling pipe 107 and is sent to the upper tank 109 of the radiator 105, and the radiator core 111
Is cooled by passing through the lower tank 113 and returned to the engine 103 from the lower tank 113. Upper tank 109
Is provided with a water injection port 115 for injecting and replenishing the cooling water W, and a radiator cap 117 for adjusting the pressure in the engine cooling pipe 107 is attached to the water injection port 115.

The radiator cap 117 is connected to the reservoir tank 121 via an overflow hose 119. The radiator cap 117 is provided with a pressure valve and a vacuum valve (not shown). For example, when the engine 103 is stopped after running under high load, the temperature of the cooling water W rises, the internal pressure of the engine cooling pipe 107 becomes equal to or higher than the specified pressure, the pressure valve opens, and the cooling water W overflows the hose 119. Is stored in the reservoir tank 121. Then, after the engine 103 is stopped, when the temperature of the cooling water W decreases and the internal pressure of the engine cooling pipe 107 becomes equal to or lower than the specified pressure after a lapse of time, the vacuum valve opens, and the cooling water W stored in the reservoir tank 121 is stored. The engine hose 10 is circulated through the overflow hose 119.
Returned to 7.

[0005]

However, in the reservoir tank 121 shown in FIG. 4, the auxiliary function of storing the cooling water W immediately after the engine 103 is stopped is occupied in the engine room 101. There is a case in which the layout space in the engine room 101 is greatly restricted by the design because of a large space.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an arrangement structure of a reservoir tank which can increase the degree of freedom in designing an engine room.

[0007]

The invention according to claim 1 of the present invention comprises a reservoir tank for storing and discharging cooling water in accordance with the adjustment of the internal pressure of an engine cooling pipe, and increasing or decreasing the amount of the stored cooling water. It is characterized in that it is formed to be expandable and contractible according to the above, and is arranged in the ventilation part inside the front grill of the vehicle.

According to a second aspect of the present invention, there is provided the reservoir tank arrangement structure according to the first aspect, wherein the reservoir tank swells due to the turbocharging pressure of the engine.
A supercharging expansion section for expanding the reservoir tank is provided, and the reservoir tank closes at least a part of the ventilation section during the expansion.

[0009]

According to the first aspect of the present invention, during normal traveling, since the internal pressure increase in the engine cooling pipe is relatively small and the amount of stored cooling water is relatively small, the reservoir tank is maintained in a contracted state. The ventilation air introduced from the front grille is supplied to the radiator, cooler condenser, etc. through the ventilation section without being blocked by the reservoir tank.

When the engine is stopped after high-load operation, the internal pressure of the engine cooling pipe is relatively large, the amount of stored cooling water increases, and the reservoir tank expands. Therefore, the ventilation portion is blocked by the reservoir tank. However, since the engine is stopped, it is not necessary to positively supply the ventilation air from the front grill, and there is no inconvenience due to the ventilation part being blocked.

According to the second aspect of the present invention, during normal traveling, the reservoir tank is in a contracted state as in the first aspect of the invention, and the conducting air from the front grill is supplied to the radiator and the cooler condenser through the ventilation section. To be done.

When the engine is stopped after high-load operation, the turbocharging pressure becomes negative and the supercharging expansion section contracts.
A sufficient storage space for cooling water in the reservoir tank can be secured, and the cooling water storage function of the reservoir tank is not impaired.

At the time of turbocharging, the supercharging expansion section receives turbocharging pressure and expands, and the reservoir tank is in an expanded state, so that leakage of engine sound from the ventilation section can be suppressed, and high soundproofing is achieved. Obtainable.

[0014]

Embodiments of the present invention will be described below.

FIG. 1 is a side sectional view showing the arrangement structure of a reservoir tank according to an embodiment of the present invention, and FIG. 2 is a perspective view of the reservoir tank of FIG.

As shown in FIG. 1, a front grill 3 is provided on the front surface 1a of a front engine type vehicle 1. The front grill 3 is composed of a radiator grill 5 provided on an upper part of the front surface 1a of the vehicle and an apron grill 9 provided below the radiator grill 5 via a front bumper 7. The engine compartment 11 inside the front grill 3 is provided with a ventilation part 13 for communicating the outside air, and the ventilation part 13 is provided with a cooling device such as a radiator 15 and a cooler condenser 17. The radiator 15 and the cooler condenser 17 have upper portions fixed to the radiator core support upper 19 and lower portions fixed to the radiator core support lower 21.

An engine cooling line 25 is provided in the engine 23 and the radiator 15. The cooling water W warmed by the engine 23 flows through the engine cooling pipeline 25 and is sent to the upper tank 27 of the radiator 15,
It is cooled by passing through the radiator core 29, returned from the lower tank 31 to the engine 23 and circulated.
A radiator cap 33 for adjusting the pressure in the engine cooling pipe 25 is attached to the upper tank 27.

A reservoir tank 39 is connected to the radiator cap 33 via an overflow hose 35. In the radiator cap 33, the cooling water W
When the temperature rises and the internal pressure of the engine cooling pipe 25 becomes equal to or higher than the specified pressure, a pressure valve (not shown) opens, and the cooling water W flows through the overflow hose 35 and is stored in the reservoir tank 39. On the contrary, when the temperature of the cooling water W decreases and the internal pressure of the engine cooling pipe 25 becomes equal to or lower than the specified pressure, the vacuum valve (not shown) opens, and the cooling water W stored in the reservoir tank 39 overflows the hose 35. To be replenished in the engine cooling pipe 25.

The reservoir tank 39 is provided in an upper ventilation portion 13a of the ventilation portion 13 which is defined inside the radiator grill 5 and in front of the radiator 15 and the cooler condenser 17. The reservoir tank 39 is formed so that it can expand and contract freely, and has a guide rail 41 that regulates the expansion and contraction direction. The reservoir tank 3
9 and the guide rail 41 form a tank unit 37.

As shown in FIG. 2, the reservoir tank 39 is made of resin or the like in a box-like box shape.
Between the upper part 43 and the lower part 45 (intermediate part 47), the entire circumference is formed into a bellows shape that is elastic. This intermediate portion 47 has elasticity, and when the stockpiling amount of cooling water increases, the intermediate portion 4
7 expands against the elastic force, and conversely, when the stockpile amount decreases, the elastic force acts and contracts. That is, the reservoir tank 3
9 is capable of expanding and contracting in the vertical direction in FIG. 2 according to the increase or decrease in the stockpiling amount of cooling water. A tank cap 49 is attached to the upper upper surface 43a of the reservoir tank 39, and a tank fixing portion 53 in which a bolt hole 51 for attaching the reservoir tank 39 is formed and an overflow hose 35 are attached to the lower portion 45 of the reservoir tank 39. Is provided with a hose connecting portion 55.

The guide rail 41 has four rail portions 57, 59, 61, 63 formed along the four corners A, B, C, D of the outer wall of the reservoir tank 39, and the rail portions 57, 57, 59. Upper ends 57a, 59a, 6 of 59, 61, 63
It is configured by a support portion 65 that connects the 1a and 63a. The reservoir tank 39 has four rail portions 57, 5
In the state where the reservoir tank 39 contracts by expanding and contracting along the inside of the rails 57, 59, 6
The part surrounded by 1, 63 becomes a space, and ventilation is possible in this space part. The supporting portion 65 is provided with a rail fixing portion 67 for fixing the guide rail 41.

As shown in FIG. 1, the reservoir tank 39 has a double structure having an inner wall (supercharged expansion portion) 69 that can expand and contract freely, and the inner wall 69 inside the reservoir tank 39.
A storage space M for storing the cooling water W is formed on the outside. The engine 23 has a turbocharger 71,
A supercharging pressure supply pipe 73 communicating with the intake manifold connection side (not shown) of the turbocharger 71 is connected to the inner side N of the inner wall 69. When the engine 23 performs the turbo supercharging operation, the turbo supercharging pressure is supplied to the inner side N of the inner wall 69 via the supercharging pressure supply pipe 73. As a result, during the turbocharged operation, the inner wall 69 swells and the reservoir tank 39 swells regardless of the amount of stored coolant W.

Tank fixing portion 5 of the reservoir tank 39
3 is fastened and fixed to the front balance panel 75 to which the radiator grill 5 and the front bumper 7 are attached, and the rail fixing portion 67 of the guide rail 41 is fastened and fixed to the radiator core support upper 19.
As a result, the tank unit 37 is provided in the upper ventilation portion 13a inside the radiator grill 5 so as to be substantially parallel to the radiator 15 and the cooler condenser 17. The reservoir tank 39 is located below the upper ventilation part 13a in the most contracted state, and closes the upper ventilation part 13a in the most expanded state.

Next, the operation of the present invention will be described with reference to FIG.

FIG. 3 is a schematic sectional view showing the state of the reservoir tank 39. (a) shows a normal running state, (b) shows a stopped state after engine high load operation, and (c) shows a turbo overrun. Indicates the salary.

During normal running, the internal pressure rise in the engine cooling pipe 25 is relatively small, so the stock of the cooling water W is small as shown in FIG. 3 (a). Therefore, the reservoir tank 39 is in a contracted state (tank height H1) due to the elastic force of the intermediate portion 47, and is located below the upper ventilation portion 13a. Therefore, the ventilation air from the radiator grille 5 is not blocked by the reservoir tank 39, and the upper ventilation part 13 is provided.
It can be supplied to the radiator 15 and the cooler condenser 17 from a.

When the engine is stopped after the high load operation, the internal pressure of the engine cooling pipe 25 rises relatively large.
As shown in (b), the cooling water W is sent to the reservoir tank 39, and the storage amount of the cooling water W increases. Therefore, the reservoir tank 39 is in an expanded state (tank height H2),
Although the upper ventilation part 13a is blocked by the reservoir tank 39, since the engine 23 has been stopped, it is not necessary to positively supply the ventilation air introduced from the radiator grille 5, and the upper ventilation part 13a. There is no inconvenience due to being blocked.

Further, at this time, the turbocharging pressure AT becomes a negative pressure, and the inside N of the inner wall 69 is in a sucked state.
The inner wall 69 contracts. Therefore, the reservoir tank 39
The storage space M is increased, and the cooling water W can be sufficiently stored.

That is, in the ventilation section 13 which has conventionally been a space for arranging parts and the like for circulation of the ventilation air,
The reservoir tank 39 can be arranged while ensuring the flowability of the conducting air, the restriction on the layout in the engine room 11 due to the reservoir tank 39 can be avoided, and the degree of freedom in designing the engine room 11 is increased.

At the time of turbocharging, the inner wall 69 expands upon receiving the turbocharging pressure AT as shown in FIG. 3C, and the reservoir tank 39 is in the most expanded state (tank height H3). As a result, the upper ventilation part 13a becomes
It is blocked by 9 and the leakage of the engine sound from the upper ventilation part 13a is suppressed, and the soundproof effect can be obtained.

That is, it is possible to improve the soundproofness while ensuring the ventilation of the ventilation air during the normal operation and suppressing the engine sound leakage during turbocharging without providing a separate soundproofing member.

In this embodiment, the tank unit 37
Although it is arranged in the upper ventilation part 13a, the arrangement place is not limited as long as it is inside the front grill 3 and may be inside the apron grill 9, for example.

Further, although the intermediate portion 47 is formed in a bellows shape and the elastic force of the intermediate portion 47 allows the reservoir tank 39 to expand and contract freely, for example, the reservoir tank 39 is contracted to the reservoir tank 39 or the guide rail 41. An elastic member such as a spring that presses in the direction may be separately provided.

[0034]

As is clear from the above, according to the invention described in claim 1, the ventilation part has a ventilation part which has a space for circulating the ventilation part, which is not provided with components or the like, but has a ventilation part. Since the reservoir tank can be arranged while securing it, the restriction on the layout in the engine room due to the reservoir tank can be avoided and the degree of freedom in designing the engine room can be increased.

According to the second aspect of the present invention, while ensuring the ventilation of the conducting air during the normal operation, it is possible to suppress the leakage of the engine sound at the time of turbocharging without separately providing a soundproof member, and thus the soundproofing is provided. Can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view according to an embodiment of the present invention.

FIG. 2 is a perspective view of a reservoir tank according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the operation of one embodiment of the present invention, (a) shows a normal operation, (b) shows a stop after engine high load operation, and (c) shows a turbocharged state. ing.

FIG. 4 is a perspective view of a conventional example.

[Explanation of symbols]

 5 Front Grill 25 Engine Cooling Pipe 39 Reservoir Tank 13 Ventilator W Cooling Water

Claims (2)

[Claims] 1. A ventilator inside a front grill, wherein a reservoir tank for storing cooling water that enters and exits according to an adjustment of the internal pressure of an engine cooling pipe is formed so as to expand and contract according to an increase or decrease in the amount of the stored cooling water. Arrangement structure of the reservoir tank, which is characterized in that it is arranged in the section. 2. The arrangement structure of the reservoir tank according to claim 1, wherein a supercharging expansion section that expands by receiving turbo supercharging pressure of an engine and expands the reservoir tank is provided inside the reservoir tank, An arrangement structure of a reservoir tank, wherein the reservoir tank closes at least a part of a ventilation part at the time of the expansion.